Advertisements
Advertisements
प्रश्न
Comment on the role of placenta as an endocrine gland.
Advertisements
उत्तर
Placenta acts as an endocrine gland and produces the human chorionic gonadotropins, human placental lactogen, oestrogen, progesterone and relaxin (later stages of pregnancy). These hormones support foetal growth and help in the maintenance of pregnancy. Hormones like oestrogen, progestogen, cortisol and prolactin are increased several folds in the maternal blood.
APPEARS IN
संबंधित प्रश्न
Choose the correct options of the following question:
Eyelids in human foetus separate in :
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
Read the following and answer from given below:
Cleavage is the series of rapid mitotic divisions in the zygote and forms blastula. The 2, 4, 8, 16 daughter cells are called blastomeres. An embryo with 64 blastomeres is known as a blastocyst and has a blastocoel cavity. Blastocyst gets implanted in the uterine wall and leads to pregnancy.
The correct sequence of various structures formed during embryonic development is ______
The secondary sexual characters develop in females because:
Assertion: Functional ADA cDNA genes must be inserted in the lymphocytes at the early embryonic stage.
Reason: Cells in the embryonic stage are mortal, differentiated and easy to manipulate.
Explain the formation of placenta after the implantation in a human female.
During embryogenesis in dicots, the zygote divides into a basal cell and a terminal cell. The basal cell divides repeatedly to produce a structure called suspensor. Carefully observe the image given below and describe the function of cell – A and cell – B of the suspensor.
Zygote
Which structure is formed after implantation of the blastocyst and connects the fetus to the uterine wall?
Through which structure is the placenta connected to the embryo, containing blood vessels for substance transport?
What is the term for the first movements of the fetus felt by the mother?
